From 80c8a2a372599e604b04a9c568952fe39cd1851d Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Mon, 9 Jan 2012 11:37:20 +0100
Subject: [PATCH] ALSA: usb-audio - Avoid flood of frame-active debug messages
With some buggy devices, the usb-audio driver may give "frame xxx active"
kernel messages too often. Better to keep it as debug-only using
snd_printdd(), and also add the rate-limit for avoiding floods.
Bugzilla: https://bugzilla.novell.com/show_bug.cgi?id=738681
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
sound/usb/endpoint.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
index 81c6edecd862..08dcce53720b 100644
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -17,6 +17,7 @@
#include <linux/gfp.h>
#include <linux/init.h>
+#include <linux/ratelimit.h>
#include <linux/usb.h>
#include <linux/usb/audio.h>
@@ -458,8 +459,8 @@ static int retire_capture_urb(struct snd_usb_substream *subs,
for (i = 0; i < urb->number_of_packets; i++) {
cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
- if (urb->iso_frame_desc[i].status) {
- snd_printd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
+ if (urb->iso_frame_desc[i].status && printk_ratelimit()) {
+ snd_printdd("frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
// continue;
}
bytes = urb->iso_frame_desc[i].actual_length;
--
2.34.1